When you say that team can use two substitutions before the start on the Bracket phase, are you referring to being able to swap out two players? Or talking about map selections?

From other replies, it seems you can change maps/settings as often as you want, and swap players per game as often as you want. So I'm assuming it is meant that prior to the bracket phase you could swap 2 players in your team. How does this apply for teams of 4 or 5 compared to teams of 6?

Eg, if I have 4 players to start, and I add two more, is that my substitutions?

When you say that team can use two substitutions before the start on the Bracket phase, are you referring to being able to swap out two players? Or talking about map selections?

From other replies, it seems you can change maps/settings as often as you want, and swap players per game as often as you want. So I'm assuming it is meant that prior to the bracket phase you could swap 2 players in your team. How does this apply for teams of 4 or 5 compared to teams of 6?

Eg, if I have 4 players to start, and I add two more, is that my substitutions?

Yes this can also be done, but those 2 should not have been playing for other teams.